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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

SYNTHESIS OF GOLD NANOPARTICLES AND COLORIMETRIC SENSING OF THE SULFATHIAZOLE: AN EXPERIMENTAL PRACTICE FOR INTERDISCIPLINARY CLASSES

Full text
Author(s):
Elias Barros Santos [1] ; Letícia Cuesta Matos [2] ; Italo Odone Mazali [3]
Total Authors: 3
Affiliation:
[1] Universidade Federal de São Paulo. Laboratório de Química Ambiental e Nanomateriais - Brasil
[2] Universidade Federal de São Paulo. Laboratório de Química Ambiental e Nanomateriais - Brasil
[3] Universidade Estadual de Campinas. Instituto de Química. Laboratório de Materiais Funcionais - Brasil
Total Affiliations: 3
Document type: Journal article
Source: Química Nova; v. 45, n. 5, p. 630-635, 2022-07-22.
Abstract

Students undertaking courses in the field of sciences and engineering need to learn practical skills and conceptual knowledge, and the experimental classes are the best moment for this. In this paper, we propose a practical experiment to aid nanotechnology learning by synthesizing gold nanoparticles (AuNPs) and their application as a colorimetric sensor of sulfathiazole. AuNPs were prepared using sodium citrate as a reducing and capping agent. The existence of the synthesized AuNPs was detected using the Tyndall effect while their optical properties were investigated by molecular absorption spectrophotometry. The gold nanoparticles exhibit spherical-like shape morphology and an average size of 13.6 nm, determined by transmission electron microscopy. The AuNPs were applied as a colorimetric sensor for the detection of sulfathiazole in mixed water/ethanol solution by simple visual inspection and using molecular absorption spectrophotometry. Due to the simplicity of the experimental steps, this activity is well-suited for a hands-on introduction of nanoparticles synthesis and its application as a molecular sensor. In addition, the experiment encompasses knowledge from different fields being suitable for interdisciplinary classes. (AU)

FAPESP's process: 18/07136-9 - Nanogold dispersed into glass and polymer matrices and its application as passive sampler for gaseous elemental mercury
Grantee:Elias de Barros Santos
Support Opportunities: Regular Research Grants
FAPESP's process: 13/22127-2 - Development of novel materials strategic for integrated analytical devices
Grantee:Lauro Tatsuo Kubota
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 14/50906-9 - INCT 2014: in Functional Complex Materials
Grantee:Fernando Galembeck
Support Opportunities: Research Projects - Thematic Grants